US3378864A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Atmospherically self-inflating buoyant device
Assignee: PHIL M CORNES
•
Filing: 1966-02-18
•
Granted: 1968-04-23
•
Expires: 1986-02-18
Abstract
No abstract record available.
Inventors
- 👤 Phil M Cornes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:41
CPC Classifications
B; B63; B63C; B63C9/00; B63C9/08; B63C9/081; Y; Y10; Y10S; Y10S206/00; Y10S206/811
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2803023A
Cited
US2997100A
Cited
US3017642A
Cited
US3133696A
Cited
US3271797A
Cited
US3205106A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-23 | 1971-10-23 | 1972-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-23 | 1975-10-23 | 1976-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-23 | 1979-10-23 | 1980-04-23 | $7700.00 | Window Closed / Lapsed |